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v3.10.0.1

Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2018
Segment Reporting [Abstract] |
Financial information for White Mountains' segments | The following table presents the financial information for White Mountains’s segments:
Millions |  | HG Global/BAM |  | NSM |  | MediaAlpha |  | Other Operations |  | Total
Three Months Ended September 30, 2018 |  |  |  |  |  |  |  |  |  |
Earned insurance premiums |  | $ | 3.3 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3.3 |
Net investment income |  | 4.8 |  |  | — |  |  | — |  |  | 8.6 |  |  | 13.4 |
Net realized and unrealized investment (losses) gains |  | (4.1 | ) |  | — |  |  | — |  |  | 70.2 |  |  | 66.1 |
Advertising and commission revenues (1) |  | — |  |  | 36.6 |  |  | 74.5 |  |  | 1.1 |  |  | 112.2 |
Other revenue |  | .2 |  |  | 3.1 |  |  | — |  |  | .4 |  |  | 3.7 |
Total revenues |  | 4.2 |  |  | 39.7 |  |  | 74.5 |  |  | 80.3 |  |  | 198.7 |
Insurance acquisition expenses |  | 1.2 |  |  | — |  |  | — |  |  | — |  |  | 1.2 |
Other underwriting expenses |  | .1 |  |  | — |  |  | — |  |  | — |  |  | .1 |
Cost of sales |  | — |  |  | — |  |  | 61.8 |  |  | 1.1 |  |  | 62.9 |
General and administrative expenses |  | 11.3 |  |  | 25.8 |  |  | 5.4 |  |  | 26.0 |  |  | 68.5 |
Broker commission expense |  | — |  |  | 10.9 |  |  | — |  |  | — |  |  | 10.9 |
Amortization of other intangible assets |  | — |  |  | 5.0 |  |  | 2.4 |  |  | — |  |  | 7.4 |
Interest expense |  | — |  |  | 3.2 |  |  | .2 |  |  | — |  |  | 3.4 |
Total expenses |  | 12.6 |  |  | 44.9 |  |  | 69.8 |  |  | 27.1 |  |  | 154.4 |
Pre-tax (loss) income |  | $ | (8.4 | ) |  | $ | (5.2 | ) |  | $ | 4.7 |  |  | $ | 53.2 |  |  | $ | 44.3 |
(1) | Approximately 30% of MediaAlpha’s advertising revenue for the three months ended September 30, 2018 was associated with one customer.
Millions |  | HG Global/BAM |  | MediaAlpha |  | Other Operations |  | Total
Three Months Ended September 30, 2017 |  |  |  |  |  |  |  |
Earned insurance premiums |  | $ | 2.4 |  |  | $ | — |  |  | $ | — |  |  | $ | 2.4 |
Net investment income |  | 3.3 |  |  | — |  |  | 8.9 |  |  | 12.2 |
Net realized and unrealized investment gains |  | .8 |  |  | — |  |  | 31.7 |  |  | 32.5 |
Advertising and commission revenues (1) |  | — |  |  | 37.9 |  |  | .9 |  |  | 38.8 |
Other revenue |  | .2 |  |  | — |  |  | 1.4 |  |  | 1.6 |
Total revenues |  | 6.7 |  |  | 37.9 |  |  | 42.9 |  |  | 87.5 |
Insurance acquisition expenses |  | .9 |  |  | — |  |  | — |  |  | .9 |
Other underwriting expenses |  | .1 |  |  | — |  |  | — |  |  | .1 |
Cost of sales |  | — |  |  | 32.2 |  |  | .9 |  |  | 33.1 |
General and administrative expenses |  | 10.6 |  |  | 3.8 |  |  | 27.3 |  |  | 41.7 |
Amortization of other intangible assets |  | — |  |  | 2.3 |  |  | .1 |  |  | 2.4 |
Interest expense |  | — |  |  | .1 |  |  | .8 |  |  | .9 |
Total expenses |  | 11.6 |  |  | 38.4 |  |  | 29.1 |  |  | 79.1 |
Pre-tax (loss) income |  | $ | (4.9 | ) |  | $ | (.5 | ) |  | $ | 13.8 |  |  | $ | 8.4 |
(1) | Approximately 32% of MediaAlpha’s advertising revenue for the three months ended September 30, 2017 was associated with one customer.
Millions |  | HG Global/BAM |  | NSM (2) |  | MediaAlpha |  | Other Operations |  | Total
Nine Months Ended September 30, 2018 |  |  |  |  |  |  |  |  |  |
Earned insurance premiums |  | $ | 9.7 |  |  | $ | — |  |  | $ | — |  |  | — |  |  | $ | 9.7 |
Net investment income |  | 12.5 |  |  | — |  |  | — |  |  | 32.4 |  |  | 44.9 |
Net realized and unrealized investment (losses) gains |  | (14.4 | ) |  | — |  |  | — |  |  | 37.3 |  |  | 22.9 |
Advertising and commission revenues (1) |  | — |  |  | 59.2 |  |  | 216.4 |  |  | 3.0 |  |  | 278.6 |
Other revenue |  | .8 |  |  | 4.0 |  |  | 1.6 |  |  | .6 |  |  | 7.0 |
Total revenues |  | 8.6 |  |  | 63.2 |  |  | 218.0 |  |  | 73.3 |  |  | 363.1 |
Insurance acquisition expenses |  | 3.9 |  |  | — |  |  | — |  |  | — |  |  | 3.9 |
Other underwriting expenses |  | .3 |  |  | — |  |  | — |  |  | — |  |  | .3 |
Cost of sales |  | — |  |  | — |  |  | 179.1 |  |  | 2.9 |  |  | 182.0 |
General and administrative expenses |  | 36.5 |  |  | 37.9 |  |  | 21.2 |  |  | 79.0 |  |  | 174.6 |
Broker commission expense |  | — |  |  | 17.5 |  |  | — |  |  | — |  |  | 17.5 |
Amortization of other intangible assets |  | — |  |  | 5.0 |  |  | 7.8 |  |  | .1 |  |  | 12.9 |
Interest expense |  | — |  |  | 4.8 |  |  | .9 |  |  | .3 |  |  | 6.0 |
Total expenses |  | 40.7 |  |  | 65.2 |  |  | 209.0 |  |  | 82.3 |  |  | 397.2 |
Pre-tax (loss) income |  | $ | (32.1 | ) |  | $ | (2.0 | ) |  | $ | 9.0 |  |  | $ | (9.0 | ) |  | $ | (34.1 | )
(1) | Approximately 31% of MediaAlpha’s advertising revenue for the nine months ended September 30, 2018 was associated with one customer.
(2) NSM’s results are from May 11, 2018, the date of acquisition, to the end of the third quarter.
Millions |  | HG Global/BAM |  | MediaAlpha |  | Other Operations |  | Total
Nine Months Ended September 30, 2017 |  |  |  |  |  |  |  |
Earned insurance premiums |  | $ | 6.6 |  |  | $ | — |  |  | $ | — |  |  | $ | 6.6 |
Net investment income |  | 8.9 |  |  | — |  |  | 30.8 |  |  | 39.7 |
Net realized and unrealized investment gains |  | 3.2 |  |  | — |  |  | 99.3 |  |  | 102.5 |
Advertising and commission revenues (1) |  | — |  |  | 101.2 |  |  | 2.7 |  |  | 103.9 |
Other revenue |  | .8 |  |  | — |  |  | 6.3 |  |  | 7.1 |
Total revenues |  | 19.5 |  |  | 101.2 |  |  | 139.1 |  |  | 259.8 |
Insurance acquisition expenses |  | 3.0 |  |  | — |  |  | — |  |  | 3.0 |
Other underwriting expenses |  | .3 |  |  | — |  |  | — |  |  | .3 |
Cost of sales |  | — |  |  | 86.0 |  |  | 2.7 |  |  | 88.7 |
General and administrative expenses |  | 31.5 |  |  | 10.7 |  |  | 113.9 |  |  | 156.1 |
Amortization of other intangible assets |  | — |  |  | 7.2 |  |  | .1 |  |  | 7.3 |
Interest expense |  | — |  |  | .6 |  |  | 1.2 |  |  | 1.8 |
Total expenses |  | 34.8 |  |  | 104.5 |  |  | 117.9 |  |  | 257.2 |
Pre-tax (loss) income |  | $ | (15.3 | ) |  | $ | (3.3 | ) |  | $ | 21.2 |  |  | $ | 2.6 |
(1) | Approximately 29% of MediaAlpha’s advertising revenue for the nine months ended September 30, 2017 was associated with one customer.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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